1.4.11 — Dual-stack discovery fix

Fixes auto-discovery for devices that advertise both IPv4 and IPv6 over mDNS (e.g. Echo Show on an IPv6-enabled network). The integration now prefers the IPv4 address instead of failing on a bare IPv6 one, so discovery no longer silently aborts.

Also: manual host entry now tolerates http:// / trailing slash / embedded port, and 're-add of an existing device' now reports 'already configured' instead of 'cannot connect'. Adds the integration's first config-flow test suite.